Arduino connection/permission error

Proffieboards
1

I have previously used arduino successfully on linux, but a few weeks ago I decided to give Fedora Plasma a try.
Today was the first time I had some time to do some proffie stuff. Arduino finds the board, but when compiling or looking at the monitor it states:

Cannot perform port reset: 1200-bps touch: opening port at 1200bps: Permission denied. Could not connect to /dev/ttyACM0 serial port.

I have done a bunch of searches and have not seen much about this error except for on windows locking the port.

Any ideas?
Fedora 43 KDE
Arduino 2.3.6 appimage

2

Found thisd and it worked:

sudo chmod a+rw /dev/ttyACM0

Not sure why it happened with this version, as I think it worked fine in Fedora Gnome.

3

Nope still having issues. I could see the monitor, but now it compiles and counts down to 1 and says “fail”. Maybe once the board reboots the permissions are lost?

/home/nathan/.arduino15/packages/proffieboard/tools/arm-none-eabi-gcc/14-2-rel1-xpack/bin/../lib/gcc/arm-none-eabi/14.2.1/../../../../arm-none-eabi/bin/ld:/home/nathan/.arduino15/packages/proffieboard/hardware/stm32l4/4.6/variants/STM32L452RE-ProffieboardV3/linker_scripts/STM32L452RE_FLASH.ld:224: warning: memory region `SRAM2' not declared
lto-wrapper: warning: using serial compilation of 4 LTRANS jobs
lto-wrapper: note: see the '-flto' option documentation for more information
/home/nathan/.arduino15/packages/proffieboard/tools/arm-none-eabi-gcc/14-2-rel1-xpack/bin/../lib/gcc/arm-none-eabi/14.2.1/../../../../arm-none-eabi/bin/ld: warning: start of section .bss changed by 8
Sketch uses 163136 bytes (32%) of program storage space. Maximum is 507904 bytes.
Cannot perform port reset: 1200-bps touch: opening port at 1200bps: Permission denied
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FAIL
4

This is a temporary fix. The correct fix can be found here:

(Specifically, copying the udev rules.)

5

doh! I totally forgot about those setup steps. Thanks!

6

The solution to any permission issues on Linux are more users, more groups, and more udev rules ;p

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